SEEDLING STRUCTURE IN THE LEGUMINOSA., 111 
Clearly in many cases no such correlation exists between the tree-habit 
and the production of large seeds ; the examples of Salix and Populus will 
atonce be recalled. But in these instances there is a high degree of speciali- 
sation for wind-dispersal, by means of a minute seed and pappus ; and such 
cases can therefore be excluded. In the Leguminose, however, there appears 
to be comparatively little special adaptation for distribution exhibited by the 
seeds themselves ; the adaptations that occur (and they are very numerous) 
are almost invariably displayed by the fruit. Sling-fruits are frequent, fleshy, 
hooked and spiny fruits for animal distribution, and winged or inflated fruits 
for wind-dispersal also occur ; brightly-coloured fleshy caruncles occur on the 
seeds in several cases, but the distribution of naked seeds by wind-agency is 
practically unknown in the family. In many cases the seeds are “hard,” 
and seem to be distributed in time rather than in space *, 
The Leguminosz, therefore, are an eminently suitable family in which to 
iry and diseover whether any correlation exists between the mature habit and 
the size of the seed, In pursuance of this end the seeds of 216 species of 
Leguminosee have been weighed, and the results are tabulated below according 
to the habit of the mature plant. In all cases, except a few of the largest, 
the average weight of several seeds is recorded. Well-developed dry seeds 
were chosen for weighing as far as possible. While accuracy cannot be 
expected in all cases, the results probably indicate more or less correctly the 
relative magnitude of the seeds of the species examined f. 
The weights are given in grams. Plants cultivated for the sake of their 
seeds are enclosed in brackets, and are excluded from the final calculation. 
Annual Herbs. 
Biserrula Pelecinus .......... ‘0018 Lupinus linifolius (P) ........ 1985 
Crotalaria pumila ............ 0050 L, luteus .................. 137 
Hippocrepis multisiliquosus .. 0081 L. micranthus .............. ‘0156 
Indigofera glandulosa ........ ‘0025 L. nanus (var. albococcinea) .. ‘077 
I. linifolia .................. 0020 L. reticulatus (P) ............ 0375 
Lathyrus Aphaca ............ ‘0190 L. уагїшз.................... :0200 
L. Nissolia .................. 0120 Medicago disciformis ........ 0057 
L.Oehrus .................. 1535 M. Кеһпиз.................. 0235 
[Lens esculentum ............ 0615] M. scutellata ................ 0239 
Lotus Tetragonolobus ........ '0651 M. turbinata ................ 0035 
Lupinus angustifolius ........ 1074 Melilotus alba .............. “0025 
L. Barkeri ......... TOP :0342 M. dentata ./................. 0024 
Ly grecus .................. 0220 M. gracilis .................. "0022 
L. игзи{ив.................. ‘5305 M. speciosa _................. 0010 
* A, J. Ewart, Proc. Roy. Soc. Victoria, Aug. 1908. 
t The size of the seed is very seldom mentioned in Floras (though it might well be a 
useful character in diagnosis), or a wider survey of this kind would have been possible. 
